public abstract class BasicPermission extends Permission implements Serializable
The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
The name for a BasicPermission is the name of the given permission (for example, "exit", "setFactory", "print.queueJob", etc). The naming convention follows the hierarchical property naming convention. An asterisk may appear by itself, or if immediately preceded by a "." may appear at the end of the name, to signify a wildcard match. For example, "*" and "java.*" signify a wildcard match, while "*java", "a*b", and "java*" do not.
The action string (inherited from Permission) is unused. Thus, BasicPermission is commonly used as the base class for "named" permissions (ones that contain a name but no actions list; you either have the named permission or you don't.) Subclasses may implement actions on top of BasicPermission, if desired.
Permission
, Permissions
, PermissionCollection
, SecurityManager
, Serialized Formpublic BasicPermission(String name)
Creates a new BasicPermission with the specified name. Name is the symbolic name of the permission, such as "setFactory", "print.queueJob", or "topLevelWindow", etc.
name
- the name of the BasicPermission.NullPointerException
- if name
is null
.IllegalArgumentException
- if name
is empty.public BasicPermission(String name, String actions)
Creates a new BasicPermission object with the specified name. The name is the symbolic name of the BasicPermission, and the actions String is currently unused.
name
- the name of the BasicPermission.actions
- ignored.NullPointerException
- if name
is null
.IllegalArgumentException
- if name
is empty.public boolean implies(Permission p)
Checks if the specified permission is "implied" by this object.
More specifically, this method returns true if:
implies
in class Permission
p
- the permission to check against.public boolean equals(Object obj)
Checks two BasicPermission objects for equality. Checks that obj's class is the same as this object's class and has the same name as this object.
equals
in class Permission
obj
- the object we are testing for equality with this object.Object.hashCode()
, HashMap
public int hashCode()
Returns the hash code value for this object. The hash code used is the hash code of the name, that is, getName().hashCode()
, where getName
is from the Permission superclass.
hashCode
in class Permission
Object.equals(java.lang.Object)
, System.identityHashCode(java.lang.Object)
public String getActions()
Returns the canonical string representation of the actions, which currently is the empty string "", since there are no actions for a BasicPermission.
getActions
in class Permission
public PermissionCollection newPermissionCollection()
Returns a new PermissionCollection object for storing BasicPermission objects.
BasicPermission objects must be stored in a manner that allows them to be inserted in any order, but that also enables the PermissionCollection implies
method to be implemented in an efficient (and consistent) manner.
newPermissionCollection
in class Permission
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